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發表於 2007-11-25 04:10 PM
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某人要到10层大楼的第8层办事,不巧停电,电梯停开。如从1层楼梯走到4层需要48秒。
/ [" M8 J0 b1 X Y! M* I7 b请问以同样的速度往上走到8层,还需要几秒才能到达?
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